Magnetic shield panel

ABSTRACT

A magnetic shield panel includes a magnetic shield member made of magnetic material; and a metallic plate or a translucent plate member, wherein the magnetic shield member is attached to the metallic plate or the translucent plate member.

TECHNICAL FIELD

The present invention relates to a magnetic shield panel used forshielding an influence of magnetism emitted from facilities, in whichmagnetism is used, to the outside, and also used for shielding aninfluence of magnetism given to the facilities from the outside.

BACKGROUND ART

On the other hand, the official gazette of Japanese Unexamined PatentPublication No. 2002-164686 discloses an open type magnetic shieldmethod. A magnetic shield room is defined by walls on which a pluralityof magnetic shield members, each of which comprises a plurality ofstrips of magnetic shield material on each other, are arrangedperpendicularly along the walls parallel to each other so that themagnetic flux density (the magnetic field intensity) can be attenuatedbetween the opposed faces of the magnetic shield members adjacent toeach other.

However, it takes much labor and time to arrange a large number ofmagnetic shield strip members along the walls in parallel to each otherwhile leaving a gap between them. Further, when an external force isapplied to the magnetic shield members, the magnetic shield members aredeformed.

DISCLOSURE OF THE INVENTION

The present invention has been accomplished in view of the above pointsof the prior art. It is an object of the present invention to provide amagnetic shield panel, the magnetic shield members of which can beeasily constructed and the shapes of which can be positively maintained.It is another object of the present invention to provide a magneticshield panel, the visibility through which can be ensured so that apatient can feel easy about being in the magnetic shield room andfurther a doctor can easily observe a condition of the patient.

The present invention provides a magnetic shield panel characterized inthat a magnetic shield member made of magnetic material is attached to ametallic plate.

According to another feature of the present invention, a magnetic shieldpanel is provided which is characterized in that a magnetic shieldmember made of magnetic material is attached to a translucent platemember.

Since the magnetic shield panel of the present invention includes amagnetic shield member, the magnetic flux, absorbed by the magneticshield member, can be diffused through the magnetic shield member. Dueto the foregoing, the magnetic shield property can be ensured.

According to the present invention, by forming a panel with a magneticshield member integrated with a metallic plate or a translucent platemember, the magnetic shield member can be easily applied. Further, bythe metallic plate or the translucent plate member, the magnetic shieldmember can be protected, and a deformation and damage, which are causedwhen an external force is carelessly given to the magnetic shieldmember, can be prevented, and the shape of the magnetic shield membercan be properly maintained.

Especially when a translucent plate member is used as a face plate, thevisibility in a room, in which a magnetic field forming apparatus suchas MRI is arranged, can be ensured. Therefore, a patient can feel easyabout being in the magnetic shield room and further a doctor can easilyobserve a condition of the patient.

In this specification, the term “translucent” includes “transparent”.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view showing a magnetic shield panel of apreferred embodiment of the present invention.

FIG. 2 is a view showing an outline of an example of a magnetic shieldroom in which the magnetic shield panel shown in FIG. 1 is used.

FIG. 3A is a perspective view of a magnetic shield member of themagnetic shield panel shown in FIG. 1.

FIG. 3B is a perspective view of a variation of the magnetic shieldmember.

FIG. 4 is a perspective view showing a portion of the magnetic shieldpanel shown in FIG. 1.

FIG. 5A is a sectional view showing a portion of the magnetic shieldroom shown in FIG. 2.

FIG. 5B is a sectional view showing a portion of the magnetic shieldroom shown in FIG. 2.

FIG. 6A is a front view briefly showing a plurality of magnetic shieldpanels connected to each other.

FIG. 6B is a sectional view showing a plurality of magnetic shieldpanels connected to each other.

FIG. 7 is a sectional view showing a portion of two magnetic shieldpanels connected to each other.

FIG. 8 is a partial sectional view showing a corner portion formed bytwo magnetic shield panels connected to each other at a right angle.

FIG. 9A is a partial sectional view showing a corner portion formed bytwo magnetic shield panels connected to each other at a right angle ofanother embodiment.

FIG. 9B is a partial sectional view showing a corner portion formed bytwo magnetic shield panels connected to each other at a right angle ofstill another embodiment.

FIG. 10 is a perspective view showing a magnetic shield panel of anotherembodiment of the present invention.

FIG. 11A is a partial side view showing a magnetic shield panel shown inFIG. 10.

FIG. 11B is a partial plan view showing the magnetic shield panel shownin FIG. 10.

FIG. 12A is a plan view showing a portion of a magnetic shield panel ofanother embodiment.

FIG. 12B is a partial side view showing a magnetic shield panel shown inFIG. 12A.

FIG. 13 is a schematic illustration showing an embodiment of a magneticshield room in which a horizontal type shield panel is used.

FIG. 14A is a sectional view briefly showing a portion of the magneticshield room shown in FIG. 13.

FIG. 14B is a partially enlarged sectional view of FIG. 14A.

FIG. 15A is a schematic illustration showing a portion of the magneticshield room shown in FIG. 13.

FIG. 15B is a sectional view showing a portion of the magnetic shieldroom shown in FIG. 13.

FIG. 15C is a sectional view showing a portion of the magnetic shieldroom shown in FIG. 13.

FIG. 16A is a schematic illustration showing an example of a magneticshield unit of another embodiment of the present invention.

FIG. 16B is a schematic illustration showing an example of a squarecylindrical body of a magnetic shield unit of another embodiment of thepresent invention.

FIG. 16C is a schematic illustration showing an example of a squarecylindrical body of a magnetic shield unit of another embodiment of thepresent invention.

FIG. 16D is a schematic illustration showing an example of a squarecylindrical body of a magnetic shield unit of another embodiment of thepresent invention.

FIG. 17 is a sectional view of a magnetic shield panel of anotherembodiment of the present invention.

FIG. 18 is a perspective view showing a variation of the magnetic shieldpanel shown in FIG. 1.

FIG. 19 is a perspective view of a heat insulating member used for themagnetic shield panel shown in FIG. 18.

FIG. 20 is a perspective view showing another embodiment of the magneticshield panel of the present invention.

FIG. 21 is a schematic illustration showing a magnetic shield member inwhich the magnetic shield panel shown in FIG. 20 is used.

FIG. 22 is a sectional view showing the magnetic shield panel shown inFIG. 20.

FIG. 23 is a sectional view showing a variation of the magnetic shieldpanel shown in FIG. 20.

FIG. 24A is a front view briefly showing a plurality of magnetic shieldpanels connected to each other.

FIG. 24B is a sectional view showing a plurality of magnetic shieldpanels connected to each other.

FIG. 25 is a partial sectional view showing a corner portion formed bytwo magnetic shield panels connected to each other at a right angle.

FIG. 26A is a partial sectional view showing a corner portion formed bytwo magnetic shield panels connected to each other at a right angle ofanother embodiment.

FIG. 26B is a partial sectional view showing a corner portion formed bytwo magnetic shield panels connected to each other at a right angle ofstill another embodiment.

FIG. 27 is a schematic illustration briefly showing a magnetic shieldroom formed by a horizontal type magnetic shield panel.

FIG. 28A is a partial sectional view showing a magnetic shield panelforming the magnetic shield room shown in FIG. 27.

FIG. 28B is an enlarged view of FIG. 28A.

FIG. 29A is a sectional view showing a variation of the magnetic shieldpanel shown in FIG. 20.

FIG. 29B is a sectional view taken in a different direction from FIG.29A.

FIG. 30 is a schematic illustration showing an arrangement of the heatinsulating member used for the magnetic shield panels in FIGS. 20, 29Aand 29B.

FIG. 31 is a schematic illustration showing an example of themanufacturing device of manufacturing the magnetic shield panel shown inFIGS. 20, 29A and 29B.

MOST PREFERRED EMBODIMENT

The most preferred embodiment of the present invention will be explainedas follows.

FIG. 2 is a view showing an example of the magnetic shield room of thepresent invention.

In this magnetic shield room, two walls 12, which are adjacent to eachother, among the ceiling 10, the floor 11 and the four walls, are formedof magnetic shield panels A of the present invention. The magneticshield panel A is of a vertical type in which magnetic shield members 2vertically and longitudinary extend. In the present invention, thelongitudinal direction of the magnetic shield member 2 may be directedin any direction. However, for example, it is preferable that thelongitudinal direction of the magnetic shield member 2 is arrangedsubstantially in parallel to the direction of the magnetic field to beshielded. In the magnetic shield room shown in FIG. 2, since themagnetic field generated from the magnetism generation source 13 such asMRI is formed being directed in the perpendicular direction, thevertical type magnetic shield panel A is used so as to shield thismagnetic field. However, the present invention is not limited to theabove specific embodiment. In this connection, the ceiling 10, the floor11 and the other walls 12, which are not composed of the magnetic shieldpanel A, may be formed of the flat-plate-shaped magnetic shield members,which are put on each other, in the same manner as that of the priorart. It is possible to give the radio wave shielding property to theceiling 10, the floor 11 and the other walls 12 when metallic sheet suchas copper sheet or mesh made of stainless steel is provided on theirsurfaces.

As shown in FIG. 1, the vertical type magnetic shield panel A of thepresent embodiment includes: a pair of translucent plate members 1, amagnetic shield member 2, an elastic member 3 and a radio wave shieldmember 4. Concerning the translucent plate member 1, as long as it isrigid and translucent, any material may be used for the translucentplate member 1. For example, it is possible to use a flat plate made oftransparent glass or synthetic resin such as acrylic resin,polycarbonate or vinyl chloride. According to a desired size of themagnetic shield panel A, the size of this plate member 1 may be anappropriate value, for example, the size may be as follows. Length 2384mm×Width 910 mm×Thickness 8 mm.

The pair of plate members 1 are arranged in parallel to each other witha gap between them. In one of the pair of plate members 1, on the innerface of the plate member opposing to the other, a plurality ofsubstantially parallel groove portions 14 are formed as shown in FIG. 4.Each groove portion 14 is formed in the vertical direction to extendfrom the upper end to the lower end of the plate member 1. The grooveportions 14 can be formed at substantially regular intervals, however,when necessary, the groove portions 14 are not arranged at regularintervals in some portions. The number of the groove portions 14corresponds to the number of the magnetic shield member 2. In thisconnection, as explained below, when the magnetic shield member 2 isarranged between the pair of plate members 1, if it is possible to holdthe magnetic shield member 2 by the tension of the elastic member 3 sothat the magnetic shield member 2 can not be bent, the groove portion 14is not necessarily required. However, when consideration is given to theassembling property of assembling the panel, it is preferable to providethe groove 14.

In this connection, in the present invention, it is not necessary thatthe plate member 1 is completely transparent, that is, the plate member1 may be a semitransparent material such as figured glass, frosted glassor punching metal. The plate member 1 may have a permiable property.Further, the plate member 1 may be composed in such a manner that oneportion is translucent and the other portion is not translucent. Forexample, the plate member 1 may be composed in such a manner that one ofthe upper and the lower portion of the plate member 1 is translucent andthe other portion is not translucent. In this case, the translucentportion may be composed of a plate member made of transparent glass orsynthetic resin such as acrylic resin, and not translucent portion maybe composed of a plate member made of plywood or plaster board.According to the present embodiment, a plurality of the above types ofplate members 1 can be appropriately combined with each other.

The magnetic shield member 2 used for the present embodiment may be madeof magnetic material such as a magnetic steel sheet, Permalloy,amorphous metal or nano-crystal magnetic material (“Finemet (R)”manufactured by Hitachi Kinzoku Co.). As shown in FIG. 3A, the magneticshield member 2 includes: a rectangular flat plate portion 15 which islong in the perpendicular direction; and engaging portions 16 providedin the upper and the lower end portion of the flat plate portion 15.Therefore, the magnetic shield member 2 is formed into substantially anI-shape when it is viewed from the front. The I-shaped magnetic shieldmember 2 includes a plurality of sections 2 a having the engagingportions 16 which are formed when both end portions of a strip membermade of magnetic material are bent in the same direction. A plurality ofsections 2 a, in the case of FIG. 3A, three sections 2 a are put on eachother so that a set of sections 2 a can be composed, and these sets ofsections 2 a are arranged back to back to form an I-shaped magneticshield member 2. In the embodiment shown in FIG. 3A, the thickness ofsix sections 2 a is 0.35 mm. However, the present invention is notlimited to the above specific embodiment. The number and the thicknessof the sections 2 a can be appropriately determined.

As shown in FIG. 3B, the magnetic shield member 2 can be composed intosubstantially a Z-shape when it is viewed from the front. In the case ofthe I-shaped magnetic shield shown in FIG. 3A, the length of the bentportions of the sections 2 a to be put on each other must be changed.However, in the case of the Z-shaped magnetic shield shown in FIG. 3B,the sections 2 a of the same shape can be used. Therefore, the magneticshield members 2 can be easily manufactured.

Except for the above shape, the cross section of the magnetic shieldmember 2 may be formed into various shapes such as a cross-shapedsection, a Y-shaped section, a circular section, a hollow circularsection, a square (rectangular) section, a hollow square (rectangular)section, a star-shaped section, an H-shaped section, an I-shapedsection, a T-shaped section, a semicircular section, a triangularsection, a vortex-shaped section, a circular section having a multilayerspace inside, and a square section having a multilayer space inside. Themagnetic shield member 2 can be formed into various shapes such as asimple-rectangular shape, an intermediate portion expanding shape, arectangular shape having a hole, a needle shape, a triangular shape, acurved rectangular shape, a bent rectangular shape, an angle membershape, a twisted rectangular shape, a spiral shape, a rotary stand shapeand a deformed reinforcing bar shape. Corrosion-prevention treatment orcoating may be conducted on the magnetic shield member 2. Coating may becarried out by a well known method such as a coating method ofdacuronium, organic substance, powder or static electricity.

The radio wave shielding member 4 is made of a metallic mesh (a wirenet). Concerning the radio wave shielding member 4, as long as it canshield the radio waves, the frequency of which is 10 kHz to 40 GHZ, anyradio wave shielding member may be used, that is, the radio waveshielding member 4 is not particularly limited to the above specificembodiment. For example, it is possible to use a metallic material suchas a stainless steel net in which the diameter of the wire is 0.02 to1.9 mm and the size of the mesh is 1.5 to 635 mesh.

Concerning the elastic member 3, it is possible to use a spring such asa coil spring. However, the elastic member 3 is not limited to a spring,for example, other materials such as rubber may be used.

The magnetic shield panel A of the present embodiment can be composedwhen one or a plurality of magnetic shield members 2 are attached to theplate member 1. That is, as shown in FIG. 1, the vertical type magneticshield panel A of the present embodiment can be composed when aplurality of magnetic shield members 2 are interposed between twotranslucent plate members 1 which are arranged being opposed to eachother. The pair of plate members 1 are arranged so that the surfaces, onwhich the groove portions 14 are formed, can be opposed to each other,and a side edge portion of the flat plate portion 15 of the magneticshield member 2 is inserted into each groove portion 14. The magneticshield members 2 are arranged at regular intervals in such a manner flatface portions (faces of the largest area) of the flat plate portions 15are arranged in parallel to each other while each magnetic shield member2 is arranged between a pair of plate members. In this case, it ispreferable that the magnetic shield panel A of the present embodimentsatisfies the following expression (1).(Sm·μs)/Sa>1  (1)where

Sm: area of lateral section of magnetic shield member 2

μs: relative magnetic permeability of magnetic material of magneticshield member 2

Sa: area of lateral section of space between magnetic shield members 2adjacent to each other

In the same manner as that of the case of the official gazette ofJapanese Unexamined Patent Publication No. 2002-164686, the magneticshield panel A satisfying the expression (1) is capable of attenuatingthe magnetic flux density at the interval between the opposing magneticshield members 2 adjacent to each other, and the magnetic shieldingeffect can be provided.

On the magnetic shield panel A of the present embodiment, the radio waveshield member 4 can be stuck on one face or both faces of a pair ofplate members 1. The transparent cover plate 70 can be provided on thesurface of this radio wave shield member 4. The cover plate 70 can beformed in the same manner as that of the plate member 1.

The top plate 17 is provided in an upper portion of the magnetic shieldpanel A of the present embodiment. The top plate 17 is arranged betweenthe upper end portions of the pair of plate members 1 and closes anupper face opening of the space formed between the pair of plate members1. Except that the size of the top plate 17 is different from the sizeof the plate member 1, the top plate 17 can be formed in the same manneras that of the plate member 1, however, the top plate 17 is notnecessarily transparent. A plurality of through-holes 18, whichpenetrate the top plate 17 in the thickness direction (the perpendiculardirection), are formed on the top plate 17. An upper portion of the flatplate portion 15 of each magnetic shield member 2 is inserted into thisthrough-hole 18. Accordingly, the engaging portion 16 of the upper endof the magnetic shield member 2 is located at a position higher than thetop plate 17. As shown in FIG. 4, the elastic member 3 is interposedbetween the upper face of this top plate 17 and the lower face of theengaging portion 16 on the upper side of the magnetic shield member 2.

The bottom plate 19 is provided in a lower portion of the magneticshield panel A of the present embodiment. The bottom plate 19 isarranged between the lower end portions of the pair of plate members 1and closes a lower face opening of the space formed between the pair ofplate members 1. Except that the size of the bottom plate 19 isdifferent from the size of the plate member 1, the bottom plate 19 canbe formed in the same manner as that of the plate member 1, however, thebottom plate 19 is not necessarily transparent. A plurality ofthrough-holes 18, which penetrate the bottom plate 19 in the thicknessdirection (the perpendicular direction), are formed on the bottom plate19. A lower portion of the flat plate portion 15 of each magnetic shieldmember 2 is inserted into this through-hole 18. Accordingly, theengaging portion 16 of the lower end of the magnetic shield member 2 islocated at a position lower than the bottom plate 19. The spacer 23 maybe provided being interposed between the lower face of the bottom plate19 and the upper face of the engaging portion 16 on the lower side ofthe magnetic shield member 2.

In this embodiment, the magnetic shield member 2 is not fixed to theplate member 1. Therefore, the magnetic shield member 2 can be moved inthe perpendicular direction. Accordingly, there is a possibility that anintermediate portion of the magnetic shield member 2 is bent anddeformed. However, as described above, the magnetic shield member 2 canbe held being stretched in such a manner that the magnetic shield member2 is pushed being extended in the longitudinal direction by the elasticmember 3. Therefore, deterioration of the magnetic shielding property ofthe magnetic shield panel A can be prevented.

Side plates 20 are provided in both side edge portions of the magneticshield panel A of the present embodiment. The side plates 20 arearranged between the side edge portions of the pair of plate members 1so that the side openings of the space formed between the pair of platemembers 1 can be closed by the side plates 20. Except that the size andthickness of the side plates 20 are different from the size andthickness of the plate member 1, the side plates 20 can be formed in thesame manner as that of the plate member 1, however, the side plates 20are not necessarily transparent. The engaging protrusion 21 is formed onan outer face of one of the side plates 20, and the engaging recess 22is formed on an outer face of the other side plate 20.

In this connection, in order to assemble the magnetic shield panel A ofthe present embodiment, each member can be fixed with the fixture suchas screws or bonded with adhesive.

When construction is conducted by arranging a plurality of vertical typemagnetic shield panels A in the substantially horizontal direction, themagnetic shield room shown in FIG. 2 can be formed. This magnetic shieldroom is capable of shielding radio waves by the radio wave shieldmembers 4.

As shown in FIGS. 5A, 5B, the magnetic shield panel A of the presentembodiment can be fixed to the ceiling structural member 25 of abuilding, which is composed of a channel steel member, by the fixingfixture 26 such as bolts. At the same time, the magnetic shield panel Aof the present embodiment can be fixed to the floor structural member 27of the building, which is composed of a channel steel member, by thefixing fixture 77 such as bolts. On the reverse side of the ceiling ofthe magnetic shield room, the ceiling side magnetic shield plate 28,which is made of the same magnetic material as described above, isprovided. On the lower face of the ceiling side magnetic shield plate28, the ceiling side radio wave shield member 29 composed of the samemetallic mesh as described above is provided. Under the floor, theunder-floor magnetic shield plate 30 made of the same magnetic materialas described above is provided. On the upper face of the under-floormagnetic shield plate 30, the floor side radio wave shield member 31composed of the same mesh as described above is provided.

The magnetic shield panel A of the present embodiment is attached to thefloor, ceiling and wall so that a gap formed between the magnetic shieldmember 2 and the under-floor magnetic shield plate 30 and a gap formedbetween the magnetic shield member 2 and the ceiling side magneticshield plate 28 can be not more than 2 mm, preferably not more than 0.5mm. In the present embodiment, the magnetic shield member 2 is formedinto a substantial I-shape or Z-shape. Therefore, the upper end face andlower end face of the magnetic shield member 2 can be made to be planeswhich are substantially parallel to the surfaces of the ceiling sidemagnetic shield plate 28 and the under-floor magnetic shield plate 30.Therefore, the ceiling side magnetic shield plate 28 and the under-floormagnetic shield plate 30 can be excellently joined to the engagingportion 16. Therefore, the magnetically shielding performance can bepositively ensured. In this connection, the top plate 33 is fixed to alower face of the ceiling structural member 25 by the fixing fixturesuch as bolts, and the floor plate 35 is fixed to an upper face of thefloor structural member 27 by the fixing fixture 36 such as bolts.

As shown in FIGS. 6A, 6B, the magnetic shield panels A, which areadjacent to each other in the horizontal direction (the lateraldirection), are connected to each other by the engagement of theengaging protrusion 21 with the engaging recess 22. At this time, asshown in FIG. 7, side edge portions of the radio wave shield members 4,which are guided out from the side edge portions of the magnetic shieldpanels A, are pinched between the side plates 20 of the magnetic shieldpanels A which are adjacent to each other. Accordingly, the radio waveshield members 4 of the magnetic shield panels A, which are adjacent toeach other, are connected to each other.

As shown in FIG. 8, at the corner portion of the magnetic shield room,two magnetic shield panels A, which are directed at a right angle, areconnected to each other via the pillar member 37. In this case, theengaging protrusion 38 is formed on one side of the pillar member 37.This engaging protrusion 38 is engaged with the engaging recess 22 ofthe magnetic shield panel A. On the other side of the pillar member 37,the engaging recess 39 is formed. This engaging recess 39 is engagedwith the engaging protrusion 21 of the magnetic shield panel A.Concerning the magnetic shield panels A connected to each other via thepillar member 37, the radio wave shield members 4 are connected to eachother by a portion of the pillar member 37.

On the two magnetic shield panels A which are adjacent and connected toeach other via the pillar member 37, it is preferable that the distance“b” between the magnetic shield members 2, which are located at theclosest positions to the pillar member 37, is smaller than the interval“a” of the magnetic shield members 2 arranged between the plate members1 of one magnetic shield panel A. Due to the foregoing, deterioration ofthe magnetic shielding property of the magnetic shield member can beprevented.

As shown in FIGS. 9A. 9B, it is possible to use a pillar member 37 intowhich the magnetic shield member 2 is incorporated. This pillar member37 is formed to be hollow, and the magnetic shield member 2 isaccommodated in the accommodating space 51 formed inside the pillarmember 37. This pillar member 37 is formed into the same shape as thatof the solid pillar member shown in FIG. 8. This hollow pillar member 37can be composed when a plurality of pillar plate members 60, the recessmember 53, the cross section of which is a substantial C-shape, and theprotrusion member 54, the cross section of which is a substantialprotrusion, are combined with each other. In this case, the recessmember 53 can be made to be the engaging recess portion 39, and theprotrusion member 54 can be made to be the engaging protrusion 38. Thepillar member 60, the recess member 53 and the protrusion member 54 canbe made of the same transparent or opaque material as that of the platemember 1. Two outer faces (the faces on the opposite side to theengaging recess portion 39 and the engaging protrusion 38) of the pillarmember 37 are provided with the pillar cover plate 61 which is formed inthe same manner as that of the above cover plate 70.

The magnetic shield member 2 is accommodated in the accommodating space51 all over the length of the accommodating space 51 in theperpendicular direction. In this case, as shown in FIG. 9A, the magneticshield member 2 can be arranged along the inner face of the protrusionmember 54. Alternatively, as shown in FIG. 9B, the magnetic shieldmember 2 can be arranged along the inner face of the recess member 53.In the examples shown in FIGS. 9A, 9B, the magnetic shield members 2 arearranged, meeting at a right angle with each other in the plan view.However, in any case, an arrangement is made so that the flat portion 15of one magnetic shield member 2 of the two magnetic shield panels Aconnected to the pillar member 37 can be opposed to the flat plateportion 15 of the magnetic shield member 2 in the pillar member 37. Anend portion of the magnetic shield member 2 is inserted into the grooveportions 14 provided on the inner face of the pillar plate member 60 andthe inner face of the protrusion member 54. When the magnetic shieldmember 2 is provided in the pillar member 37 as described above, it ispossible to prevent the magnetic shield performance from beingdeteriorated by the pillar portion 37.

Concerning the magnetic shield room, a portion or all of at least oneface of the ceiling face 10, the floor face 11 and the wall face 12 canbe composed of the above magnetic shield panel A. In this case, thecircumstances outside the room can be seen from the inside of the roomthrough the magnetic shield panel A. Further, the circumstances insidethe room can be seen from the outside of the room through the magneticshield panel A. Therefore, the magnetic shield room can be preferablyused for MRI apparatus room in a hospital.

FIGS. 10 and 11 are views showing another embodiment of the magneticshield panel A. On this magnetic shield panel A, the plate member 1, thecover plate 70, the top plate 17, the floor plate 19 and the side plate20 are composed of a transparent glass plate. As described before, theplate member 1 can be formed into a predetermined size. In thisstructure, two pieces of the plate members 1 are used as one set.However, the plate members 1 does not have a constitution correspondingto the groove portion 14 described before, that is, the inner face (theopposing face) of the plate member 1 is a flat face. The magnetic shieldmember 2, the elastic member 3 and the radio wave shield member 4 can beformed in the same manner as that of the embodiment described before.

The top plate 17 is composed of a plurality of top plate members 17 a.When the top plate members 17 a are arranged at predetermined intervals,the top plate members 17 a are arranged between the upper end portionsof a pair of plate members 1 so that an upper face opening of the spaceformed between the pair of plate members 1 can be closed. A gap formedbetween the top plate members 17 a adjacent to each other is formed as athrough-hole 18 provided on the top plate 17.

The floor plate 19 is composed of a plurality of floor plate members 19a. When the floor plate members 19 a are arranged at predeterminedintervals 19 b, the floor plate members 19 a are provided between thelower end portions of a pair of plate members 1 so that a lower faceopening of the space formed between the pair of plate members 1 can beclosed. An interval between the bottom plate members 19 a, which areadjacent to each other, is formed as a through-hole 18 provided on thebottom plate 19. Further, on the side plate 20, the engaging protrusion21 and the engaging recess portion 22 are not formed, that is, the sideplate 20 is formed into a flat plate shape, and a plurality of gapmembers 63 are provided on an outer face of the side plate 20.

When the plate member 1, the cover plate 70, the ceiling member 17 a,the bottom member 19 a, the side plate 20, the magnetic shield member 2,the elastic member 3 and the radio wave shield member 4 are assembled inthe same manner as described before, the magnetic shield panel A can beformed. As shown in FIGS. 11A, 11B, when the plate member 1, the coverplate 70, the ceiling member 17 a, the bottom plate member 19 a and theside plate 20 are assembled, the connecting fixtures 64 are used. Eachconnecting fixture 64 is comprised of an L-shaped angle steel member 65and a plurality of connection screws 66. In both end portions of theangle steel member 65, the screw holes 67 capable of being screwed tothe connection screws are provided. On the plate member 1, the coverplate 70, the ceiling member 17 a, the floor plate member 19 a and theside plate 20, the through-hole 68 penetrating in the thicknessdirection is provided.

A method of connecting the above members of the plate member 1 andothers by using the connecting fixture 64 will be explained as follows.First, the angle steel member 65 is arranged between the members to beconnected by the connecting fixture 64. That is, as shown in FIGS. 12Aand 12B, the angle steel member 65 is arranged between the plate member1 and the top plate member 17 a, between the plate member 1 and thebottom plate member 19 a, between the plate member 1 and the side plate20, between the side plate 20 and the top plate 17 a and between theside plate 20 and the bottom plate member 19 a. At this time, the anglesteel member 65 is arranged on the inner face side of the cover plate70, the ceiling member 17 a, the bottom plate member 19 a and the sideplate 20. The through-holes 68 provided on the cover plate 70, theceiling member 17 a, the bottom plate member 19 a and the side plate 20are positioned to the screw hole 67.

Next, the connecting screw 66 is inserted into the through-hole 68 fromthe outer face side of the cover plate 70, the top plate member 17 a,the bottom plate member 19 a and the side plate 20, and a forward endportion of the connection screw 66 is screwed into the screw hole 67 ofthe angle steel member 65. At this time, in the case where the covermember 70 is provided on an outer face of the plate member 1, theconnection screw 66 is inserted from an outer face of the cover member70 via the through-holes 68 of the cover member 70 and the plate member1. In this way, the cover plate 70, the top plate member 17 a, thebottom plate member 19 a and the side plate 20 are connected to eachother. In this connection, the pair of plate members 1 are not justrightly opposed to each other but they are opposed to each other beingsomewhat displaced from each other. Due to the above structure, theprotruding piece 69 is formed out of the side edge portion protrudingoutside from the side plate 20 of the plate member 1.

The magnetic shield panel A illustrated in FIG. 10 can be fixed to theceiling structural member 25 and the floor structural member 27 by thesame method as that described before. However, the magnetic shieldpanels A, which are adjacent to each other in the horizontal direction(the lateral direction), are not connected by means of engagement butthey are fixed to each other when the side plates 20 are butted to eachother. When the magnetic shield panels A, which are adjacent to eachother in the horizontal direction (the lateral direction), are buttedand fixed to each other, the magnetic shield panels A can be positionedin the perpendicular direction by the gap members 63. In thisconnection, the thickness of the gap member 63 is substantially the sameas the protruding length of the protruding piece 69 from the side plate20. The thickness of the head portion of the connecting screw 66 issmaller than the thickness of the gap member 63.

FIG. 13 is a view showing a magnetic shield room of another embodimentof the present invention.

In this magnetic shield room, two wall faces among the ceiling face 10,the floor face 11 and the four wall faces 12 are formed out of themagnetic shield panels A of the present embodiment. In the presentembodiment, the magnetic shield panel A is a horizontal type magneticshield panel A on which the magnetic shield member 2 is horizontallyformed, that is, the magnetic shield member 2 is formed in the lateraldirection. In the magnetic shield room shown in FIG. 13, a direction ofthe magnetic field generated from the magnetism generator 13 is lateral(substantially horizontal). In order to shield this magnetic field, thelateral type magnetic shield panel A is used in the present embodiment.However, the present invention is not limited to the above specificembodiment. In this connection, the following constitution may beadopted. For the ceiling face 10, the floor face 11 and other wall faces12, which are not composed of the magnetic shield panel A, theconventional tightly closed type magnetic shield panel is used, andtheir surfaces are covered with metallic foil such as copper foil ormesh made of stainless steel so as to give the radio wave shieldingproperty to the magnetic shield panel.

The horizontal type magnetic shield panel A includes a pair oftranslucent plate member 1, a magnetic shield member 2 and a radio waveshield member 4. Longitudinal directions of the plate member 1 and thegroove portion 14 are substantially horizontal. Except for that, thehorizontal type magnetic shield panel is composed in the same manner asthat of the vertical type magnetic shield panel described before. Thatis, the groove portion 14 is formed all over the length of the platemember 1 in the horizontal direction so that the groove portion 14 canbe provided from one end of the plate member 1 to the other end. Themagnetic shield member 2 used for the horizontal type magnetic shieldpanel A is formed into a rectangular plate shape which is long in thehorizontal direction. Except for that, the magnetic shield member 2 usedfor the horizontal type magnetic shield panel A is formed in the samemanner as that of the vertical type magnetic shield panel describedbefore. That is, the magnetic shield member 2 includes: arectangular-plate-shaped flat plate portion 15 which is long in thehorizontal direction; and a forward end portion 40 adjoining both endportions of the flat plate portion 15 in the longitudinal direction. Inthe magnetic shield member 2, the engaging portion 16, which is providedin the embodiment described before, is not formed. The radio wave shieldmember 4 used for the horizontal type magnetic shield panel A is thesame as that of the vertical type magnetic shield panel describedbefore. In this connection, the horizontal type magnetic shield panel Ais not provided with the elastic member 3 and the side plate 20.

On the horizontal type magnetic shield panel A, the magnetic shieldmember 2 is extended long in the horizontal direction. Except for that,the horizontal type magnetic shield panel A can be formed in the samemanner as that of the vertical type magnetic shield panel A. That is, aplurality of magnetic shield members 2 are arranged between a pair ofplate members 1 which are arranged being opposed to each other. The pairof plate members 1 are arranged in such a manner that one side of oneplate member 1, on which the groove portion 14 is formed, is opposed toone side of the other plate member 1 on which the groove portion 14 isformed, and a side edge portion of the flat plate portion 15 of themagnetic shield member 2 is inserted into the groove portion 14. Themagnetic shield members 2 are arranged, being separate from each other,at predetermined intervals between the pair of plate members 1 so thatthe plane portions (the faces of the largest area) of the flat plateportions 15 can be opposed to each other. Even in the case of thehorizontal type magnetic shield panel A, it is preferable that theexpression (1) is satisfied. When this condition is satisfied, themagnetic shield property can be provided.

The horizontal type magnetic shield panel A includes the same radio waveshield member 4 as that of the vertical type magnetic shield panel. Onthe surface, the transparent cover plate 70 is provided on its surface.On the horizontal type magnetic shield panel A, in the same manner asthat of the embodiment described before, the top plate 17 and the bottomplate 19 are provided, however, the aforementioned through-hole 18 isnot formed on the top plate 17 and the bottom plate 19.

Further, the horizontal type magnetic shield panel A does not includethe side plate 20 which is provided in the vertical type magnetic shieldpanel. A space formed between the pair of plate members 1 is open to theside of the magnetic shield panel A. The forward end portion 40 of themagnetic shield member 2 arranged between the pair of plate members 1 isprotruded from there. On the horizontal magnetic shield panel A, themagnetic shield member 2 is not fixed to the plate member 1 but can bemoved in the horizontal direction. When the magnetic shield member 2 isinserted into the groove portion 14, the magnetic shield member 2 can beheld between the pair of plate members 1 without being bent in thecentral portion. Therefore, deterioration of the magnetic shieldproperty of the horizontal magnetic shield panel A can be prevented.

When a plurality of horizontal type magnetic shield panels A arearranged in the perpendicular and the horizontal direction, the magneticshield room shown in FIG. 13 can be formed. In the same manner asdescribed above, this magnetic shield room can also shield radio wavesby the radio wave shield member 4. The horizontal type magnetic shieldpanels A can be subjected to construction in the same manner as that ofthe vertical type magnetic shield panels. The horizontal type magneticshield panels A, which are located at the uppermost and the lowermostposition, are respectively fixed to the ceiling structural member 25 andthe floor structural member 27, and the magnetic shield panels Aadjacent to each other in the horizontal direction are connected witheach other by the accessory 46. That is, as shown in FIGS. 14A and 14B,on the front and the reverse face of the horizontal type magnetic shieldpanels A, the joint (the gap) 45 is formed between the side edgeportions of a pair of plate members 1. The accessory 46, the crosssection of which is a substantially T-shape, is arranged in this joint45. The magnetic shield panels A can be fixed by this accessory 46. Theaccessory 46 can be a molding made of metal such as aluminum, however,other metals can be used for molding the accessory 46. The accessory 46is provided with a base member 47 and a cover member 48. The base member47 is attached to the plate member 1 and the cover plate 70 by thefixing fixture 49 such as a screw. The cover member 48 is attached tothe base member 47 by the fixing fixture 50 such as a screw.

The forward end portion 40 of the magnetic shield member 2 protrudingoutside (on the side) of the side edge portion of a pair of platemembers 1 is adjacent to the horizontal type magnetic shield panels Aadjoining in the horizontal direction. As explained below, the forwardend portions 40 are connected to each other. Referring to FIGS. 15A and15B, the forward end portion 40 of the section 2 a protruding from oneof the magnetic shield panel A which are adjacent to each other and theforward end portion 40 of the section 2 a protruding from the othermagnetic shield panel A are arranged being opposed to each other whileleaving a predetermined interval L1 (not more than 2 mm, preferably notmore than 0.5 mm). Next, the forward end portions 40, which are opposedto each other, are interposed between a pair of patches 41. Therefore,the forward end portions 40 are clamped in the perpendicular directionby the clamping fixture 42 such as a clip together with the patches 41as shown in FIG. 15C. In this case, the patches 41 are made of the samematerial as that of the section 2 a , and the length is preferably notless than 50 mm. In this case, the length is the size in the samedirection as the longitudinal direction of the section 2 a.

It is preferable that a plurality of shield members 2 a composing themagnetic shield member 2 has a predetermined length L3, preferably apredetermined length L3 which is not less than 10 mm, and the pluralityof shield members 2 a are arranged being offset in the longitudinaldirection. Due to the foregoing, end portions of the sections 2 a of themagnetic shield member 2 are not arranged on the perpendicular straightline but arranged on an oblique line. Further, side edge portions of theradio wave shield members 4 protruding from the side edge portions ofthe horizontal type magnetic shield panels A, which are adjacent to eachother in the horizontal direction, are connected with each other by theconnecting member 52. The side edge portions of the electric shieldmember 4 are connected to each other by the joint 45 on the reverse sideof the accessory 46.

In this connection, it is possible to form a magnetic shield room whenboth the vertical and the horizontal type magnetic shield panel A areused. In this case, the vertical and the horizontal type magnetic shieldpanel A are arranged before and behind so that the plate member 1 of thevertical type magnetic shield panel A and the plate member 1 of thehorizontal type magnetic shield panel A can be opposed to each other.Due to the foregoing, not only the magnetic fields in the perpendicularand the horizontal direction but also the magnetic fields in alldirections can be shielded.

In the above embodiment, the magnetic shield room is composed in such amanner that two wall faces are respectively formed out of the magneticshield panels A. However, all the six faces including the ceiling face10, the floor face 11 and the four wall faces 12 may be composed of themagnetic shield panels A of the present invention. In this case, themagnetic shield unit 55 shown in FIG. 16A is used. As shown in FIGS.16B, 16C, 16D, the magnetic shield unit 55 has three hollow squarecylindrical bodies 56 a, 56 b, 56 c having an opening portion at bothend portions. Four faces of each of the square cylindrical bodies 56 a,56 b, 56 c are formed out of a plurality of magnetic shield panels Awhich are long in the circumferential direction. Sizes of the threesquare cylindrical bodies 56 a, 56 b, 56 c are different from eachother. As shown in FIGS. 16B, 16C, 16D, the three square cylindricalbodies 56 a, 56 b, 56 c are directed in three different directionsmeeting at right angles with each other and combined with the insert. Inthe magnetic shield unit 55, the perpendicular and the horizontalmagnetic shield panel A are arranged before and behind. Due to theforegoing, not only the magnetic fields in the vertical and thehorizontal direction but also the magnetic fields in all directions canbe shielded.

In the embodiment described before, it is explained that the magneticshield panel A includes a pair of plate members 1. However, it should benoted that the present invention is not limited to the above specificembodiment. For example, the magnetic shield panel A may be composedwhen the magnetic shield member 2 is provided on one plate member 1.Further, on the magnetic shield panel A of the present embodiment, it ispossible to use not less than three plate members 1. For example, asshown in FIG. 17, when a plurality of magnetic shield members 2 arearranged on three plate members 1 which are arranged being opposed toeach other, the magnetic shield panel A can be composed. In this case,the plate member 1 arranged at the center is mainly used as areinforcing plate.

Next, referring to FIGS. 18 and 19, still another embodiment of thepresent invention will be explained below.

In this embodiment, the translucent heat insulating member 71 isaccommodated inside the magnetic shield panel A. For example, as shownin FIG. 19, the heat insulating member 71 can be formed into arectangular parallelepiped. Concerning the translucent property of theheat insulating member 71, the heat insulating member 71 may becompletely transparent or opaque in the same manner as that of the platemember 1. The heat insulating member 71 is composed of a hollow membermade of elastomer such as natural rubber or synthetic rubber.Alternatively, the heat insulating member 71 is composed of a hollowmember made of synthetic resin such as polyethylene, polypropylene,polyvinyl chloride (PVC) or urethane.

The heat insulating member 71 is filled between the magnetic shieldmembers 2 adjacent to each other and bonded onto the inner face (theopposing face) of the plate member 1 by adhesive. When the magneticshield member 2 and the heat insulating member 71 are tightly contactedwith each other, the magnetic shield member 2 can be interposed betweenthe heat insulating members 71, which are adjacent to each other, andheld at a predetermined position.

Still another embodiment of the present invention will be explainedbelow.

FIG. 21 is a view showing an example of the magnetic shield room of thepresent embodiment. In the same manner as that of the embodiment shownin FIG. 2, in this magnetic shield room, two wall faces among theceiling face 210, the floor face 211 and the four wall faces 212 areformed out of the magnetic shield panels B of the present embodiment. Inthe present embodiment, the magnetic shield panel B is a vertical typemagnetic shield panel B on which the magnetic shield member 202 isperpendicularly formed, that is, the magnetic shield member 202 isformed in the vertical direction. In this embodiment, the longitudinaldirection of the magnetic shield member 202 may be set in any direction.For example, the longitudinal direction of the magnetic shield member202 can be set in the direction parallel to the direction of themagnetic field to be shielded. In the magnetic shield room shown in FIG.21, the direction of the magnetic field, which is generated from themagnetism generation source 213 such as MRI apparatus arranged in theroom, is in the vertical direction. In order to shield this magneticfield, the vertical type magnetic shield panel B is used. However, thepresent invention is not limited to the above specific embodiment. Inthis connection, the ceiling face 210, the floor face 211 and other wallfaces 212, which are not composed of the magnetic shield panel B, can becomposed when flat-plate-shaped magnetic shield members are put on eachother in the same manner as the conventional manner, and their surfacescan be covered with metallic foil such as copper foil or mesh made ofstainless steel so as to give the radio wave shielding property to themagnetic shield panel.

Referring to FIG. 20, the magnetic shield panel B includes: a pair ofmetallic plates 201 arranged in parallel to each other being separatefrom each other; a plurality of magnetic shield members 202 formed inthe same manner as that of the magnetic shield member 2 explainedreferring to FIGS. 3A and 3B; and a heat insulating member 203 arrangedon the magnetic shield panel B. Concerning the metallic plate 201, aslong as the thickness of the metallic plate is 0.25 to 1.6 mm so thatthe rigidity of the panel can be ensured and as long as the metallicplate has a radio wave shielding property for shielding electromagneticwaves, the frequency of which is 10 kHz to 40 GHz, any material can beadopted. Examples of the metallic plate 201 are: an iron plate, a steelplate, a stainless steel plate, a coated plate, a galvanized steelplate, an aluminum-galvanized steel plate, and a flat plate of aluminum.Especially, it is preferable that the metallic plate 201 is made of ahighly electrically conductive material such as iron, copper oraluminum. The performance of the magnetic shield, which is disclosed inthe official gazette of Japanese Unexamined Patent Publication No.2002-164686, with respect to AC is inferior compared with theperformance of the magnetic shield with respect to DC. However, when themetallic plate 201 is made of the above materials, the performance withrespect to AC can be enhanced by the effect of shielding an eddycurrent. The metallic plate 201 may be a perforated metallic plate suchas a punching metal. The size of this metallic plate can be anappropriate value according to a desired size of the magnetic shieldpanel B. For example, the size of this metallic plate can be 2384 mmlength×910 mm width. However, the size of this metallic plate in notlimited to this specific embodiment.

The heat insulating member 203 may be made of a conventionally used heatinsulating material. Examples of the heat insulating material are:inorganic fiber such as rock fiber, glass fiber or ceramic fiber; andfoamed resin such as urethane foam or phenol foam. It is preferable thatrock fiber or glass fiber, the heat insulating performance and the fireresistance performance of which are high, is used for the heatinsulating member 203. The heat insulating member 203 can be formed intoa block shape like a square bar. The density of the heat insulatingmember 203 is usually 20 to 400 kg/m³. However, it is preferable thatthe density of the heat insulating member 203 is 120 to 200 kg/m³.

The magnetic shield panel B can be composed in such a manner that aplurality of magnetic shield members 202 and heat insulating members 203are provided between a pair of metallic plates 201. That is, as shown inFIG. 20, The magnetic shield panel B can be formed when a plurality ofmagnetic shield members 202 and heat insulating members 203 areinterposed between a pair of metallic plates 201 which are arranged inparallel being opposed to each other. The magnetic shield members 202are arranged, being separate from each other, at predetermined intervalsbetween the pair of metallic plate members 201 so that the planeportions (the faces of the largest area) of the flat plate portions 215can be opposed to each other. Even in the case of the magnetic shieldpanel B, it is preferable that the expression (1) described before issatisfied.

In the present embodiment, the heat insulating member 203 is filledbetween the magnetic shield members 202 on the magnetic shield panel Band bonded on the inner faces (the faces opposed to each other) of themetallic plates 201. As shown in FIG. 30, a plurality of heat insulatingmembers 203 are arranged zigzag on the magnetic shield panel B so thatthe seam joints 203 a can not be arranged on a straight line. Thisstructure is preferable from the viewpoint of ensuring the mechanicalstrength of the magnetic shield panel B.

In this embodiment, the magnetic shield member 202 is not fixed to themetallic plate 201 in the same manner as that of the magnetic shieldmember 2 of the embodiment described before. Therefore, the magneticshield member 202 can be moved in the longitudinal direction (theperpendicular direction). The magnetic shield member 202 is pinched fromboth sides by the heat insulating members 203 substantially all over thelength. Accordingly, there is no possibility that the magnetic shieldmember 202 is bent and deformed at the middle portion. Therefore,deterioration of the magnetic shielding property of the magnetic shieldpanel B can be prevented.

As shown in FIG. 23, when the side edge of the magnetic shield member202 is separated from the inner face of the metallic plate 201 by apredetermined distance, preferably by the distance of 3 to 10 mm, andwhen the magnetic shield member 202 is held by the heat insulatingmember 203, the occurrence of a so-called heat bridge can be preventedin which heat is conducted from one metallic plate 201 to the othermetallic plate 201 via the magnetic shield member 202.

In the case where the heat insulating member 203 is made of fiber suchas rock fiber, it is preferable that the fiber is mainly directed in thethickness direction (the direction perpendicular to the surface of themetallic plate 201) of the magnetic shield panel B. Due to theforegoing, deterioration of the mechanical strength of the magneticshield panel B can be prevented.

The magnetic shield panel B of the present embodiment includes: anengaging protruding portion 221 formed in one side edge portion; and anengaging recess portion 222 formed in the other side edge portion. Asshown in FIGS. 22 and 23, the engaging protruding portion 221 is formedwhen the protruding portion side protruding piece 221 a formed bybending one side edge portion of the metallic plate 201 is arrangedbeing opposed under the interposition of the heat insulating member 203.The engaging recess portion 222 is formed when the recess portion sideprotruding piece 222 a, which is formed by bending the side edge portionon the opposite side to the protruding piece 221 a on the metallic plate201, is arranged being opposed under the interposition of the heatinsulating member 203. Accordingly, the side of the heat insulatingmember 203 provided between the metallic plates 201 is covered with theprotruding portion side protruding piece 221 a and the recess portionside protruding piece 222 a.

The magnetic shield member 202 is arranged between a pair of metallicplates 201 so that the engaging portion 216 of the magnetic shieldmember 202 can be protruded from an upper end and a lower end of themetallic plate 201. An upper face and a lower face of the heatinsulating member 203 are exposed from between the pair of metallicplates 201.

When construction is conducted in such a manner that a plurality ofvertical type magnetic shield panels B are arranged in the substantiallyhorizontal direction, the magnetic shield room shown in FIG. 21 can becomposed. This magnetic shield room can also shield radio waves by themetallic plates 201.

In the substantially same manner as that of the embodiment explainedreferring to FIGS. 5A and 5B, the magnetic shield panel B of thisembodiment can be fixed to the ceiling structural member and the floorstructural member of a building by the fixing fixture such as bolts.

As shown in FIGS. 24A and 24B, the magnetic shield panels B, which areadjacent to each other in the horizontal direction (the lateraldirection), are connected to each other by the engagement of theengaging protruding portion 221 with the engaging recess portion 222. Inthe engaging protruding portion 221 with the engaging recess portion222, it is preferable that coating on the metallic plates 201 of themagnetic shield panel B is peeled off. Due to the foregoing, by theengagement of the engaging protruding portion 221 with the engagingrecess portion 222, the metallic plate 201 on the magnetic shield panelB is electrically connected to the metallic plate 201 on the adjoiningmagnetic shield panel B. Therefore, the radio waves absorbed by themetallic plate 201 are diffused to a large number of metallic plates201, and the radio wave shielding performance can be enhanced.

As shown in FIG. 25, at the corner portion of the magnetic shield room,the magnetic shield panels B, which are arranged being directed at aright angle, are connected to each other via the pillar member 237. Inthis case, the engaging protrusion 238 is formed on one side of thepillar member 237. This engaging protrusion 238 is engaged with theengaging recess 222 of the magnetic shield panel B. On the other side ofthe pillar member 237, the engaging recess 239 is formed. This engagingrecess 239 is engaged with the engaging protrusion 221 of the magneticshield panel B.

On the two magnetic shield panels B which are adjacent and connected toeach other via the pillar member 237, it is preferable that the distance“b” between the magnetic shield members 202, which are located at theclosest positions to the pillar member 237, is smaller than the interval“a” of the magnetic shield members 202 arranged between the metallicplate members 201 of one magnetic shield panel B. Due to the foregoing,deterioration of the magnetic shielding property of the magnetic shieldmember can be prevented. Concerning the magnetic shield room, a portionor all of at least one face of the ceiling face 210, the floor face 211and the wall face 212 can be composed of the above magnetic shield panelB.

As shown in FIGS. 26A. 26B, it is possible to use a pillar member 237into which the magnetic shield member 202 is incorporated. This pillarmember 237 is composed in such a manner that the magnetic shield member202 is arranged in the hollow pillar outline member 237 a, which is longin the perpendicular direction, and the heat insulating member 203 isfilled inside the pillar outline member 237 a. The outer shape of thepillar outline member 237 a is the same as that of the solid pillarmember shown in FIG. 25.

The pillar outline member 237 a can be formed by bending the samemetallic plate as the metallic plate 201. The engaging recess portion239 and the engaging protruding portion 238 can be formed by means offolding. The magnetic shield member 202 is accommodated inside thepillar outline member 237 a all over the length in the perpendiculardirection. As shown in FIG. 26A, the magnetic shield member 202 can bearranged inside the engaging protruding portion 238. Alternatively, asshown in FIG. 26B, the magnetic shield member 202 can be arranged insidethe engaging recess portion 239. In the embodiments shown in FIGS. 26Aand 26B, directions of the magnetic shield members 202 are differentfrom each other by about 90°. However, in either embodiment, themagnetic shield member 202 of one of the two magnetic shield panels Bconnected to the pillar member 237 is opposed to the flat plate portionof the magnetic shield member 202. When the magnetic shield member 202is provided in the pillar member 237 as described above, the magneticshielding performance in the pillar member 237 can not be lowered.

FIG. 27 is a view showing another embodiment of the magnetic shield roomof the present invention.

In the same manner as that of the embodiment explained referring to FIG.13, concerning this magnetic shield room, two wall faces out of theceiling face 210, the floor face 211 and four wall faces 212 arecomposed of the magnetic shield panels B of the present embodiment. Inthis embodiment, the magnetic shield panel B is a horizontal typemagnetic shield panel B on which the magnetic shield member 202 isformed horizontally, that is, the magnetic shield member 202 is formedin the horizontal direction.

The horizontal type magnetic shield panel B includes a pair of metallicplates 201, a magnetic shield member 202 and a heat insulating member203. The horizontal type magnetic shield panel B can be substantiallycomposed in the same manner as that of the vertical type magnetic shieldpanel B except that the magnetic shield member 202 is formed into arectangular plate shape, which is long in the horizontal direction, andnot provided with the engaging portion 216. The metallic plate 201 issubstantially composed in the same manner as that of the metallic plateof the vertical type magnetic shield panel B except that thelongitudinal direction of the metallic plate 201 is substantiallyhorizontal.

Between a pair of metallic plates 201 arranged being opposed to eachother, a plurality of magnetic shield members 202 and the heatinsulating member 203 are arranged. The magnetic shield members 202 arearranged between the pair of metallic plates 201 so that the magneticshield members 202 can be perpendicularly directed to the metallicplates 201. In this case, even in the case of the horizontal typemagnetic shield panel B, it is preferable that the expression (1) issatisfied. When this condition is satisfied, the magnetic shieldingproperty can be effectively obtained.

In the case of the horizontal type magnetic shield panel B, the magneticshield panels B, which are adjacent to each other on the upper and lowersides, are connected to each other by the engagement of the engagingprotrusion with the engaging recess in the same manner as the case inwhich the vertical type magnetic shield panels B are connected to eachother in the horizontal direction. Shapes of the engaging protrusion andthe engaging recess of the magnetic shield panels B are the same asthose of the case shown in FIG. 20. An end face of the heat insulatingmember 203 provided between a pair of metallic plates 201 is exposedfrom the opening of the end faces of the magnetic shield panels B. Theforward end portion 240 of the magnetic shield member 202 is protrudedfrom the opening of this end face.

In the case of the horizontal type magnetic shield panel B, the magneticshield member 202 is not fixed to the metallic plate member 201.Therefore, the magnetic shield member 202 can be moved in the horizontaldirection. Accordingly, there is a possibility that an intermediateportion of the magnetic shield member 202 is bent and deformed. However,as described above, when the magnetic shield member 202 is interposedbetween the heat insulating members 203 adjacent to each other,deflection of the magnetic shield member 202 can be prevented.Therefore, deterioration of the magnetic shielding performance of themagnetic shield panel B can be prevented.

In the same manner as that of the embodiment explained before referringto FIG. 13, when construction is conducted by arranging a plurality ofhorizontal type magnetic shield panels B in the vertical and horizontaldirections, the magnetic shield room shown in FIG. 27 can be formed.This magnetic shield room is also capable of shielding radio waves bythe metallic plate 201.

The horizontal type magnetic shield panels B are applied substantiallyin the same manner as that of the vertical type magnetic shield panelsB. The magnetic shield panels B, which are located at the uppermost andthe lowermost position, are respectively fixed to the ceiling structuralmember 25 and the floor structural member 27 (FIGS. 5A and 5B), and themagnetic shield panels B adjacent to each other in the horizontaldirection are connected with each other by the accessory 246. That is,as shown in FIGS. 28A and 28B, on the front and the reverse face of thehorizontal type magnetic shield panels B, the joint (the gap) 245 isformed between the edge portions of a pair of metallic plate members201. The accessory 246, the cross section of which is a substantiallyT-shape, is arranged in this joint 245. The magnetic shield panels B canbe fixed by this accessory 246. The accessory 246 can be a molding madeof metal such as aluminum, however, other metals can be used for moldingthe accessory 246. The accessory 246 is provided with a base member 247and a cover member 248. The metallic plate member 201 is attached to thebase member 247 by the fixing fixture 249 such as a screw. The covermember 248 is attached to the base member 247 by the fixing fixture 50such as a screw.

The forward end portion 240 of the magnetic shield member 202 protrudingoutside (on the side) of the end portion of a pair of metallic platemember 201 is adjacent to the horizontal type magnetic shield panels Badjoining in the horizontal direction. As explained below referring toFIGS. 15A, 15B and 15C, the forward end portions 240 are connected toeach other.

Next, another embodiment is shown in FIGS. 29A and 29B.

On the magnetic shield panel B of this embodiment, the heat insulatingmember 203 is formed into a hollow body. Other points of theconstitution are the same as those of the embodiment explained referringto FIGS. 20 to 28. For example, as shown in FIG. 19, the hollow heatinsulating member 203 can be formed into a rectangular parallelepiped.The heat insulating member 203 is composed of a hollow member made ofelastomer such as natural rubber or synthetic rubber. Alternatively, theheat insulating member 71 is composed of a hollow member made ofsynthetic resin such as polyethylene, polypropylene, polyvinyl chloride(PVC) or urethane. The heat insulating member 203 may be translucent oropaque.

The heat insulating member 203 is filled between the magnetic shieldmembers 202 adjacent to each other and bonded onto the inner face (theopposing face) of the metallic plate 201 by adhesive. When the magneticshield member 202 and the heat insulating member 203 are tightlycontacted with each other, the magnetic shield member 202 can beinterposed between the heat insulating members 203, which are adjacentto each other, and held at a predetermined position. When the hollowheat insulating member 203 is used as described above, the weight of themagnetic shield panel B can be reduced as compared with the case inwhich the solid heat insulating member 203 is used. When it is necessaryto enhance the rigidity of the magnetic shield panel B, the heatinsulating member 203, the rigidity of which is relatively high, isused.

Next, referring to FIG. 31, a method of manufacturing the magneticshield panel B will be explained below.

First, the heat insulating members 203 and the magnetic shield members202 are arranged at predetermined positions on the metallic plate 201.In order to arranged the heat insulating members 203 and the magneticshield members 202 on the metallic plate 201, the heat insulatingmembers 203 and the magnetic shield members 202 can be alternatelyarranged on the metallic plate 201. Alternatively, a unit is made byalternately arranging the heat insulating members 203 and the magneticshield members 202, and the thus made unit can be put on the metallicplate 201.

The metallic plate 201, on which the heat insulating members 203 and themagnetic shield members 202 are arranged, is held on the elevatingholding device 103. Next, the other metallic plate 201 is reversed bythe reversal device 104 and put on the heat insulating members 203arranged on the metallic plate 201 which is held on the elevatingholding device 103. In this case, the metallic plate 201 to be reversedis coated with adhesive. In this way, the heat insulating members 203and the magnetic shield members 202 can be arranged between the pair ofmetallic plates 201.

In this connection, the heat insulating members 203 and the magneticshield members 202 may be arranged on the metallic plate 201 under thecondition that the metallic plate 201 is held on the elevating holdingdevice 103. Alternatively, the heat insulating members 203 and themagnetic shield members 202 may be arranged on the metallic plate 201under the condition that the metallic plate 201 is not held on theelevating holding device 103. It is preferable that the elevatingholding device 103 includes a holding fixture 105 for holding themetallic plate 201, on which the heat insulating members 203 arearranged, at a predetermined position. The reversal device 104 includesa sucking fixture 106 composed of a magnet or a vacuum suction pad.Further, there is provided a holding fixture 107 for holding themetallic plate 201 to be reversed at a predetermined position withrespect to the reversal device 104. Furthermore, there is provided acompressing device 108 for pushing and compressing end portions of theheat insulating members 203 so that the metallic plate 201 can be easilyput on the heat insulating members 203.

In this connection, even in the case of the magnetic shield panel Bexplained referring to FIGS. 20 to 29, of course, the magnetic shieldroom shown in FIGS. 16A to 16D can be composed by combining the verticaltype magnetic shield panel B with the horizontal type magnetic shieldpanel B.

1. A magnetic shield panel comprising: a plurality of magnetic shieldmembers made of magnetic material; a translucent plate member to whicheach magnetic shield member is attached; and a holding member forholding the magnetic shield member so as to avoid deflection of eachmagnetic shield member, wherein the holding member is a translucent heatinsulating member positioned close to the plurality of magnetic shieldmembers, the translucent heat insulating member being filled between theplurality of magnetic shield members for holding the magnetic shieldmembers so as to avoid deflection of each magnetic shield member.
 2. Amagnetic shield panel according to claim 1, wherein the holding memberis an elastic member for stretching the magnetic shield member in thelongitudinal direction thereof.
 3. A magnetic shield panel according toclaim 1, wherein the magnetic shield panel comprises a plurality oftranslucent heat insulating members, each translucent heat insulatingmember being formed into a rectangular parallelepiped, the plurality ofheat insulating members being arranged zigzag on the magnetic shieldpanel so that seam joints of each heat insulating member are notarranged in a straight line.
 4. A magnetic shield panel according toclaim 1, further comprising a hollow pillar member for connecting aplurality of magnetic shield panels to each other, the hollow pillarmember having a magnetic shield member therein.
 5. A magnetic shieldpanel according to claim 1, further comprising a radio wave shieldmember made of electrically conductive material.
 6. A magnetic shieldpanel according to claim 5, wherein the radio wave shield member is ametallic mesh attached to the translucent plate member.
 7. A magneticshield panel according to claim 1, wherein the number of the translucentplate members is not less than two.
 8. A magnetic shield panel accordingto claim 1, wherein the magnetic shield member is arranged substantiallyin parallel with the direction of a magnetic field.
 9. A magnetic shieldpanel according to claim 1, wherein engaging portions are provided atboth end portions of the magnetic shield member, and the magnetic shieldmember is formed into a substantial Z-shape.
 10. A magnetic shield panelaccording to claim 1, wherein engaging portions are provided at both endportions of the magnetic shield member, and the magnetic shield memberis formed into a substantial I-shape.
 11. A magnetic shield panelcomprising: a plurality of magnetic shield members made of magneticmaterial; a metallic plate to which each magnetic shield member isattached; and a holding member for holding the magnetic shield member soas to avoid deflection of each magnetic shield member, wherein theholding member is a heat insulating member positioned close to theplurality of magnetic shield members, the heat insulating member beingfilled between the plurality of magnetic shield members for holding themagnetic shield members so as to avoid deflection of each magneticshield member.
 12. A magnetic shield panel according to claim 11,wherein the holding member is an elastic member for stretching themagnetic shield member in the longitudinal direction thereof.
 13. Amagnetic shield panel according to claim 11, wherein the magnetic shieldpanel comprises a plurality of heat insulating members, each heatinsulating member being formed into a rectangular parallelepiped, theplurality of heat insulating members being arranged zigzag on themagnetic shield panel so that seam joints of each heat insulating memberare not arranged on a straight line.
 14. A magnetic shield panelaccording to claim 11, further comprising a hollow pillar member forconnecting a plurality of magnetic shield panels to each other, thehollow pillar member having a magnetic shield member therein.
 15. Amagnetic shield panel according to claim 11, wherein the heat insulatingmember is made of refractory material.
 16. A magnetic shield panelaccording to claim 11, wherein the number of the metallic plates is notless than two.
 17. A magnetic shield panel according to claim 11,wherein the magnetic shield member is arranged substantially in parallelwith the direction of a magnetic field.
 18. A magnetic shield panelaccording to claim 11, wherein engaging portions are provided at bothend portions of the magnetic shield member, and the magnetic shieldmember is formed into a substantial Z-shape.
 19. A magnetic shield panelaccording to claim 11, wherein engaging portions are provided at bothend portions of the magnetic shield member, and the magnetic shieldmember is formed into a substantial I-shape.
 20. A magnetic shield panelaccording to claim 11, wherein the metallic plate is made of materialselected from a group including iron, steel, copper, aluminum, stainlesssteel, galvanized steel and aluminum-galvanized steel.